package com.lanou.bookstore.user.web.servlet;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebServlet("/logout")
public class LoginOut extends HttpServlet {

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        HttpSession session = req.getSession(false);
        if (session != null && session.getAttribute("uname") != null){

            // 使session无效
            session.removeAttribute("uname");
            session.invalidate();

            resp.sendRedirect("/jsps/user/login.jsp");

        }
    }
}
